Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
khong cuong » khong xuong, hong cuong, thong chuong
thieu xanh » chieu xanh, hieu manh, thien anh
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
danh toan » manh toan, anh toan, dang toan
dan toan » van toan, dan than, manh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien thanh)) - thanh trung cua khong cuong ((danh toan) OR (dan toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien thanh)) - thanh trung cua khong cuong ((danh toan) OR (dan toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien thanh)) - thanh trung cua khong cuong ((danh toan) OR (dan toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien thanh)) - thanh trung cua khong cuong ((danh toan) OR (dan toan)) cau*.